The system that we considered is the
mainline portion of Alternate
Route 7 from the I-87 interchange on the west to the I-787 interchange on the
east. But do we need to extend the boundary of our study area further in
order to capture any other effects? We know that there are problems with
the interchanges themselves. Some of these problems appeared in the analysis
that we conducted for problems 2 and 3 of this case study. So, widening the
system to include the interchanges might prove beneficial in our assessment of
Alternate Route 7.
This leads to the next issue, the possible use of
micro-simulation. Under what conditions should we consider
micro-simulation modeling? The first such condition is when demand exceeds
capacity, particularly when there is an intersection of queues on the facility. Here,
there is value in the ability of a micro-simulation model to follow the behavior of
individual vehicles and drivers as they negotiate a congested facility. A second such condition is when we are considering a large and complex
system, such as a freeway mainline and interchanges.
In problem 5 of this case study, we will illustrate how one
micro-simulation tool can be used to study the operation of Alternate Route 7.
] to Analysis
of Problem 4 [ Continue ] to